Printer&#39;s quoin



H. KLEIN PRINTER April 17, 1934.

S QUOIN Filed Dec. 20, 1932 J Harry ,ZYEZEZ INVENTOR ATTORNEYS Patented Apr. 17, 1934 UNITED STATES PATENT OFFICE 2 Qlaims.

This invention relates to an improved printers quoin and the essential purpose of this invention is to produce a quoin, wherein the adjustment of the two sections of the quoin may be easily facilitated, and after the two sections have been adjusted, a positive lock between the two sections is afforded.

Heretofore quoins have been produced with spring tensioned pins between the two sections,

and in a certain printers quoin in addition to the spring pressed pin it is necessary to operate a device, which will so cooperate with its spring pressed pin as to permit the two sections of the quoin to be separated. In these types of quoins where there are spring tensioned pins, the pins have to drag over the teeth with which they cooperate to hold the sections adjusted. The fact is there is no rolling movement of the pins, hence there would be substantial wear on the teeth with which the pins cooperate, and in the case where a device is used to actuate a pin to release the two sections of the quoin considerable time is required to accomplish the result.

The purpose of the present invention is to eliminate such spring tensioned pins and to provide in lieu thereof a rolling case hardened steel ball, so resiliently mounted as to allow the ball to yield in passing over the teeth, and at the same time roll and hence render easy adjustment of the two sections of the quoin and relieve wear on the teeth and yet provide a positive look after adjustment is made between the two sections of the quoin.

It is to be understood that the particulars here- 35, in given are in no way limitative, and that while still keeping within the scope of the invention, any desired modication of details and proportions may be made in the construction of the appliance according to circumstances.

The invention comprises further features and combination of parts to be hereinafter set forth shown in the drawing and claimed.

In the drawing:-

Figure 1 is a view showing the application of the printers quoin, as used in a frame.

Figure 2 is a longitudinal sectional view of Fig" ure 1, showing the parts enlarged, so as to bring out the mounting of the case hardened steel balls.

Figure 3 is a cross sectional view on line 3-3 10f Figure 2.

Figure 4 is a perspective view showing the two sections of the quoin separated.

Referring to the drawing 1 and 2 identifies the two sections of the printers quoin. In addition 5.5. to these sections being of the general shape of the usual printers quoin, namely having inclined adjacent faces 3 and diagonally opposite enlarged heads a, the sections are provided with approximately opposite semicylindrical recesses 5, which substantially register for the reception of the conventional type of key for engagement with opposite semicylindrical recesses, and by which the sections of the quoin can be adjusted, for tightening and clamping the straight furniture 6 and the type 7 in the chase 8.

The heads or enlargements 4 on their diagonal opposite faces are provided with longitudinal grooves 8', and formed on the adjacent inclined faces of the two sections of the quoin centrally thereof and incident to and in alignment with the grooves are ribs 9, which are provided with semicylindrical notches 10. The construction and arrangement of the ribs 9 are such that the ribs will engage in the grooves 8', not only guiding the two sections but also holding them in register. 7

The heads of the two sections of the quoin have pockets 11 for the reception of case hardened steel balls 12. These pockets are drilled transversely through the heads or enlargements of the two sections of the quoin, that is drilled through from the remote faces of the two sections of the quoin, so that their other ends may open at points in the bottom of the grooves 8, and it is adjacent these latter open ends of the pockets that the case hardened steel balls 12 are arranged. It 85. will be noted that the pockets adjacent these latter open ends are larger in diameter than the width of the grooves 8', causing shoulders 13 to be formed, or the opposite walls of the grooves 8 are bent over as shown insuring forming the shoulders 13, which will act to retain the case hardened steel balls in position andfrorn displacement, that is, from leaving the pockets. Arranged in the pockets are coil springs 14, which act against the balls to hold them in contact with the shoulders. The ends of the pockets adjacent the remote faces of the two sections of the quoin have fixed therein back of the coil springs suitable fillers 15, which may consist of lead or other suitable material to act as abutments for the springs.

It is obvious that when the two sections of the quoin are placed together with their adjacent inclined faces in proper position, ribs engage with the respective grooves 8', in such manner that the notches 10 will receive the diagonal opposite case hardened steel balls, which will act to retain the two sections of the quoin in difi'erent adjusted positions, according to the adjustment necessary to bind the straight furniture, and the type in the chase or frame.

When a key for adjusting the two sections of the quoin is engaged in the semicylindrical recesses 5, and the key rotated the case hardened steel balls will depress the coil springs, and at the same time roll from one set of semicylindrical recesses to another set, hence preventing undue wear on the ribs and at the sametime facilitate the adjustment of the two sections of the quoin.

The invention having been set forth, what is claimed is:

1. A printers quoin comprising two sections, the diagonal opposite heads of which havin grooves, in the bottoms of which, pockets are formed, said pockets having their opposite ends normally open, the adjacent faces of-the two sections being correspondingly inclined and, pro-v vided with ribs incident to and in alignment with and entering the grooves, said ribs having semicylindrical notches, rolling tensioned ballsv mount:

ed in said pockets and protruding beyond the bottoms of the grooves for rolling cooperation in either direction with the notches in the ribs, and abutments positioned at the opposite open ends of the pockets for retaining said tensioned balls in place.

2. A printers quoin comprising two sections, the diagonal opposite heads of which having grooves, the adjacent faces of the two sections being correspondingly inclined and provided with ribsincident to and in alignment with and entering the grooves, said ribs having semicylindrical notches, said heads having pockets normally open at, both ends, certain of the openings being in the bottomsof the grooves, certain walls of the openings in the bottoms of the grooves being peened overconstituting shoulders for abutment to the balls, the other openings of the pockets having suitable filler deposits constituting abutments, tensioning means between the balls and the filler deposits to retain the balls against the abutment shoulders, whereby balls may-have a rolling cooperation in either direction with the notches of, the ribs.

HENRY KLEIN. 

